This
is may be one of the best I've seen.
https://www.vonskip.com/2012/03/bel-air-patina_28.html
I'd saved out another picture I can't currently find as an example. I recall it as a Bel Air, I may be mistaken. This ad just calls it 'outstanding'. The paint is worn down, not ground down.
Some things just make sense, like vertical streaks below badges and door handles.